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While these plants are relatively low maintenance, it’s not unusual for peace lily leaves to turn yellow here and there due to stress, pests, or other issues. This guide explains the most common ...
Sometimes it helps to give the plant's pot a quarter-turn every week or so to straighten out its growth, but the better option is to increase light exposure. 5. Losing Variegation or Fenestration
Nitrogen deficiencies also cause leaves to remain small, and drop prematurely, resulting in less photosynthesis occurring in the plant, and fewer, smaller tubers can form for harvest. Research done by Yara International has shown that there is a direct correlation between tuber size and yield, and the amount of plant-available nitrogen in the soil.
Papaya Lethal Yellowing Virus (PLYV) is an isometric viral plant pathogen, tentatively assigned to the genus Sobemovirus, [1] that causes lethal yellowing disease of the papaya plant. [ 2 ] The virus infects only Carica papaya , Jacaratia heterophylla , J. spinosa , Vasconcellea cauliflora , V. monoica and V. quercifolia , all from the papaya ...
Trees infected with citrus blight can be detected by testing the level of zinc in a plant's bark (high levels of zinc indicate an infection) and by testing for anti-viral proteins – produced by the plant to fight the blight – in a plant's roots and leaves. The finding of plugs in a tree's xylem is a strong indication it is infected with ...
Japanese maple autumn leaves. Autumn leaf color is a phenomenon that affects the normally green leaves of many deciduous trees and shrubs by which they take on, during a few weeks in the autumn season, various shades of yellow, orange, red, purple, and brown. [1]
In plants affected by Xanthomonas, the wilting can begin with any leaf and the infected leaves tend to snap along the leaf blade. Two external symptoms help characterize Panama disease of banana: Yellow leaf syndrome, the yellowing of the border of the leaves which eventually leads to bending of the petiole. [1]
Iron deficiency showing chlorotic leaves in a lemon tree. Compare yellow chlorotic leaves with the green non chlorotic leaves at left of this image. Iron (Fe) deficiency is a plant disorder also known as "lime-induced chlorosis". It can be confused with manganese deficiency.